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EC number: 210-638-3 | CAS number: 620-40-6
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2020-05-11
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- 92.8 °C
- Atm. press.:
- 991 hPa
- Decomposition:
- no
- Sublimation:
- no
- Conclusions:
- The melting point was determined to be 92.8 °C.
- Executive summary:
The melting point of the test item was determined by Differential Scanning Calorimetry according to Regulation (EC) No 440/2008 Method A.1. and OECD Test Guideline 102 (1995). In the DSC measurement the first endothermic effect could be observed in the temperature range of 90 – 100 °C, which was followed by second endothermic effect in the temperature range of 320 – 390 °C. The first endothermic effect is assigned to the melting point. As the onset temperatures in both tests do not deviate by more than 0.5 K from their mean value of 92.80 °C, this temperature can be used as melting point. The test item has a melting point of 92.8 °C.
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Principles of method if other than guideline:
- The substance’s property is described in a reliable source. No details on the method used for determination are provided.
- GLP compliance:
- not specified
- Type of method:
- other: not specified
- Key result
- Melting / freezing pt.:
- 91.5 °C
- Remarks on result:
- other: No further information provided
- Conclusions:
- The melting point was 91.5 °C as described in a reliable data collection.
Referenceopen allclose all
In the temperature range of 90 to 100 °C a first endothermic effect could be observed. A second endothermic effect was detected in the temperature range of 320 to 390 °C. No further thermic effects could be observed up to the maximum temperature of 500 °C.
Results of the DSC-measurements
No. | Sample weight / mg | Onset of Effect / °C | Range of effect / °C | Weight loss / mg | Atmospheric pressure / hPa |
PN19667 | 10.05 | 92.70 | 90 – 100 (endo) | 10.05 | 991.9 |
PN19668 | 10.23 | 92.90 | 90 – 100 (endo) | 10.23 | 991.9 |
During the heating phase a distinct endothermic effect was observed in the temperature range of 90 – 100 °C, which can be assigned to the melting of the test item.
As the onset temperatures in both tests do not deviate by more than 0.5 K from their mean value of 92.80 °C, this temperature can be used as melting point. The test item has a melting point of 92.8 °C.
Description of key information
The melting point was determined to be 92.8 °C (reference 4.2-2).
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 92.8 °C
Additional information
The melting point of the test item was determined by Differential Scanning Calorimetry according to Regulation (EC) No 440/2008 Method A.1. and OECD Test Guideline 102 (1995). In the DSC measurement the first endothermic effect could be observed in the temperature range of 90 – 100 °C, which was followed by second endothermic effect in the temperature range of 320 – 390 °C. The first endothermic effect is assigned to the melting point. As the onset temperatures in both tests do not deviate by more than 0.5 K from their mean value of 92.80 °C, this temperature can be used as melting point. The test item has a melting point of 92.8 °C.
As supporting information the melting point was described as 91.5 °C in a reliable data collection (reference 4.2-1).
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